The deadly Carr Fire near Redding in Shasta County is still only 5 percent contained and has consumed 80,906 acres, Cal Fire reported this afternoon. A Redding firefighter was killed Friday and a contract firefighter operating a bulldozer died Thursday. The blaze has destroyed 500 structures and damaged 75 and is threatening 4,978 structures, Cal Fire said at 1:45 p.m. today.

Firefighters worked aggressively through the evening to build containment lines around the fire, according to Cal Fire. A red flag warning and heat advisory are in effect for the area, and the winds, high temperatures and dry vegetation still have the potential to fuel fire growth.

Several people have been injured fighting the Carr Fire, including three firefighters from the Marin County Fire Department who suffered burns to their faces, ears and hands on Thursday when a sudden blast of heat from nearby vegetation overwhelmed them as they defended a structure.

A total of 3,410 people are battling the blaze, according to Cal Fire. City and county firefighters, engines, command vehicles and other support units have been deployed to help fight the massive blaze from nearly every Bay Area County including Alameda, Contra Costa, Marin, San Francisco, San Mateo, Sonoma and Santa Clara counties.